Carefully examine page in old learning (7)
I believe the answer is:
explore
'carefully examine' is the definition.
'page in old learning' is the wordplay.
'page' becomes 'p'.
'in' indicates putting letters inside.
'old' becomes 'ex'.
'learning' becomes 'lore' (I've seen this before).
'ex'+'lore'='exlore'
'p' placed inside 'exlore' is 'EXPLORE'.
(Other definitions for explore that I've seen before include "Carefully survey" , "Travel through for purpose of discovery" , "Search and inquire into" , "Look around; examine" , "Examine by touch" .)